The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 01, 2005
Filed:
Mar. 02, 2001
Applicant:
Olav Erga, Jakobsli, NO;
Inventor:
Olav Erga, Jakobsli, NO;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B025/30 ;
U.S. Cl.
CPC ...
Abstract
The present invention describes a procedure for the removal of sodium sulphate from a phosphate solution that has been used for absorption of SOfrom flue gases, in which a precipitate forms when the absorption solution is regenerated by evaporation. In this procedure a part of the precipitate is separated from its solution and treated with water and SOfor transformation of disodium-hydrogen phosphate into monosodium dihydrogen phosphate in the aqueous solution. The sodium sulphate remains undissolved and is removed by filtration. The filtrate is then added back to the main process.